Lyricloid

Lyricloid (リリコイド), a combination of the terminology lyric and Vocaloid, pertains to fanmade Vocaloids with special needs or abilities.

Depiction
Lyric Vocaloids have varying appearances that typically depend on their character.

History
Lyric Vocaloids were first introduced on June 15, 2012. The first Lyricloid being, Emi, an original Fanloid character that suffers from blindness.

Lyricloid on Fanloid Wiki

 * Emi, is an original fanmade Vocaloid who's blind.
 * Dawn, is an original fanmade Vocaloid who is color blind.
 * Dew, is an original fanmade Vocaloid who can see spirits.
 * Carly, is an original fanmade Vocaloid who has multiple personalities.